[gst-devel] State change issues when asking for a RTSP stream with VLC

Thu Mar 5 17:28:05 CET 2009

Gstreamer MPEG demuxing is in charge of ffmpeg, isn't it? I have updated
ffmpeg to the latest git version but it hasn't solved anything. I have also
uninstalled the fluendo MPEG muxers and demuxers plugins with no positive
results.

On the other hand, multicast streaming (not RTSP) MPEG over UDP is played
back smoothly, as local files do.

Has anyone any idea about why I could play properly RTSP/RTP streaming
contents before and now I get choppy playback?

Thank you for your time and sorry for the inconvenience,
Javi

2009/3/5 Javier Gálvez Guerrero <javier.galvez.guerrero at gmail.com>

> Thanks for your answer, Wim.
>
> So, Gstreamer 0.8 MPEG demuxers worked but those used in 0.10 are not
> working properly?
>
>
> Regards,
> Javi
>
> 2009/3/5 Wim Taymans <wim.taymans at gmail.com>
>
> On Thu, 2009-03-05 at 10:28 +0100, Javier Gálvez Guerrero wrote:
>> > Hi,
>> >
>> > I managed this issue by installing the UGLY plugins. However, I don't
>> > know if this is the proper way to solve my issue.
>> >
>> > Now I can get the RTSP stream (both from VLC and Live555 RTSP servers)
>> > but the video framerate is lower than the original and not stable. I
>> > have checked that all RTP packets are received (sequence numbers are
>> > ok) and I get neither error nor warning messages from Gstreamer, so I
>> > don't know what is happening and how I could get a smooth video
>> > playback in RTSP streaming (the same video played locally works
>> > smoothly).
>> >
>> > As said before, I have these problems since I updated Gstreamer from
>> > 0.8 to 0.10, so I don't know if there is any related issue with these
>> > problems or if I'm missing something. Anyway, I would like anyone to
>> > help me getting things working, either downgrading to 0.8 (I don't
>> > know where to find this version) or managing with the current 0.10
>> > version I've just installed.
>> >
>>
>> The mpeg demuxers don't support demuxing live streams yet and screw up
>> the timestamps, which makes the result rather choppy.
>>
>> Wim
>> >
>> > Thank you all,
>> > Javi
>> >
>> >
>> > 2009/3/4 Javier Gálvez Guerrero <javier.galvez.guerrero at gmail.com>
>> >         Hi there,
>> >
>> >         I was using the Gstreamer framework (version 0.8) to get some
>> >         tests. I used Gstreamer as client and VLC (0.9.4) as RTSP
>> >         server and it worked smoothly. The problem has arised when
>> >         updating Gstreamer to 0.10.21. When I launch "gst-launch-0.10
>> >         playbin uri=rtsp://IP:PORT/content it never starts playing the
>> >         media. Using VLC as a client works ok.
>> >
>> >         I can see with Wireshark the RTSP message exchange (PAUSE and
>> >         then TEARDOWN) and I get these error messages where launching
>> >         Gstreamer:
>> >
>> >         Estableciendo el flujo a PAUSADO ... (PAUSED)
>> >         El flujo es en vivo y no necesita PRECACHEADO ... (PRECACHED)
>> >         Estableciendo el flujo para REPRODUCCIÓN ... (PLAY)
>> >         New clock: GstSystemClock
>> >         ERROR: desde el
>> >         elemento
>> /GstPlayBin:playbin0/GstDecodeBin:decodebin0/ffdec_mpegvideo:ffdec_mpegvideo0:
>> Internal GStreamer error: negotiation problem.  Please file a bug at
>> http://bugzilla.gnome.org/enter_bug.cgi?product=GStreamer.
>> >         Información adicional de depurado:
>> >         gstffmpegdec.c(2339): gst_ffmpegdec_chain
>> >         ():
>> /GstPlayBin:playbin0/GstDecodeBin:decodebin0/ffdec_mpegvideo:ffdec_mpegvideo0:
>> >         ffdec_mpegvideo: input format was not set before data start
>> >         Execution ended after 887032082 ns.
>> >         Estableciendo el flujo a PAUSADO ...
>> >         Estableciendo pipeline a READY...
>> >         Estableciendo pipeline a NULL...
>> >         LIBERANDO pipeline ... (FREEING)
>> >
>> >
>> >         I would like to know how I can solve this issue and, in case
>> >         the only solution is downgrading to gstreamer 0.8, could
>> >         anybody tell me where can I find it?
>> >
>> >         By the way, as you may have noted, I am a newbie in the
>> >         Gstreamer framework, but I am quite interested in succeedin
>> >         using it. Any help would be much appreciated.
>> >
>> >
>> >         Thank you,
>> >         Javi
>> >
>> >
>> >
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